Video that shows boat traveling at high speed while dragging a shark went viral.

Charges against one of the three men accused in a Hillsborough County shark-dragging incident were dropped last week, according to court records.

Spencer Heintz, 23, of Palmetto, was one of the three men charged in December 2017 with two counts of aggravated cruelty to animals — a third-degree felony — in connection with a video that surfaced in July showing a shark being dragged behind a boat while traveling at a high rate of speed.

After reviewing the case, the Office of the State Attorney for the 13th Judicial Circuit decided May 1 to dismiss charges against Heintz.

"Based on additional case files that were presented, they didn't have sufficient evidence to proceed with charges," said Sammecia Bagley, spokeswoman for the state attorney's office.

Three men have been arrested in connection with a viral video of a shark being dragged behind a boat.(Photo: USA TODAY NETWORK -Florida)

The state will continue to prosecute the two other men accused in the incident, Michael Wenzel, 21, and Robert Lee Benac, 28. Wenzel and Benac were booked on two counts of aggravated animal cruelty and a misdemeanor violation of FWC rules, according to Hillsborough County Sheriff's Office records.

Robert Lee Benac(Photo: Hillsborough County Sheriff's Office)

Third-degree felonies are punishable by up to five years in prison, according to the Florida Department of Corrections.

The Florida Fish and Wildlife Conservation Commission conducted a four-month investigation after the video spread on social media and sparked outrage. The footage showed the men pointing and laughing as the black-tip shark tumbled behind the vessel.

A separate video taken earlier that day showed Wenzel shoot a black-tip shark in the left side of the head near the gills with a .38 caliber handgun while Benac pulled it close to the boat, according to court documents.

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Lindsay French, manager of the International Shark Attack File at the Florida Museum of Natural History at the University of Florida, gives tips about what to do if you are bitten by a shark. WILL GREENLEE/TCPALM
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Aerial video taken on Feb. 27, 2018 right off MacArthur Park in Singer Island shows dramatically fewer blacktip sharks during migration season as compared to previous years (2011 to 2017). Video by Florida Atlantic University. Posted March 1, 2018